Watch This Couple's Breathtaking Dance—On the Side of a Building

We love to dance almost as much as Taylor Swift, and dance cardio has pretty much become a staple in our weekend routine at this point (hey, if it works for Shakira...). But this. This video of two Bandaloop dancers ballroom dancing on the side of a building in Oakland, Calif., brings the term "dance cardio" to a whole new level.

It's gravity-defying, mesmerizing, and kind of terrifying. Seriously—Amelia Rudolph and Roel Seeber waltzing on the side of Oakland's City Hall building during the city’s Art + Soul Festival is like watching something out of a fantastical dreamscape. But it's totally real, and it will make you appreciate the athleticism and skill that goes into ballroom dancing like you never have before. Their whole routine was captured on GoPro for our viewing pleasure, but be warned: if you’re scared of heights, proceed with caution. Check it out: